YOKOGAWA UP55A - Chapter 8 Control Functions; Setting Control Mode (CTLM); Single-Loop Control, Single-Loop HeatingCooling Control, and Single-Loop Position Proportional Control

8-1
IM 05P02C41-01EN
Control Functions
8
8.1 SettingControlMode(CTLM)
8.1.1 Single-loopControl,Single-loopHeating/coolingControl,andSingle-
loop Position Proportional Control
SettingDetails
Parameter
symbol
Name Displaylevel Settingrange Menusymbol
CTLM Control mode STD
SGL: Single-loop control
CAS1: Cascade primary-loop
control
CAS: Cascade control
PVSW: Loop control with PV
switching
PVSEL: Loop control with PV auto-
selector
CTL
 CAUTION
• Someparameterswillbeinitializedifthecontrolmode(CTLM)ischanged.
• When using the ladder program, the control mode cannot be changed.
Description
These control modes provide the basic control function having one control computation
unit.
Single-loop control can be used for Standard type or Heating/cooling type controller.
Single-loop heating/cooling control can be used for Heating/cooling type controller.
Single-loop position proportional control can be used for Position proportional type
controller.
► PID control: 8.2 Setting Control Type (CNT)
Uptofour10-segmentlinearizerapproximation/10-segmentlinearizerbiasescanbe
used for the input unit or output unit.
The Function block diagram describes only the basic functions.
Parameter symbols in the Function block diagram describe representative parameters.
For the functions and parameters which are not described in Function block diagram, see
the following.
► Contactinputassignment:12.1SettingContactInputFunction
► Contactoutputassignment:12.2SettingContactOutputFunction
► Contactoutputassignmenttoretransmissionoutputterminal:10.1SettingControlOutputType
► Analogoutputrangechange:10.14ChangingCurrentOutputRange
Chapter 8 Control Functions